Tyranitar

Great League: 2.5 / 5

Tyranitar’s heavily attack-weighted stat distribution does it no favors down in Great League. A double weakness to Fighting-type damage, in addition to weaknesses against common Water, Grass, and Ground-type attacks, makes it a very risky Pokemon. While it shines in certain limited metagames, its stats combined with the fact that a lot of other things can do its job don't leave it super happy.

Ultra League: 2 / 5

The higher CP cap in Ultra allows Tyranitar to perform better, though not necessarily well. Its Rock/Dark typing gives it a solid matchup against both Giratina forms, but make it much weaker against Fighting-types, in addition to Grass and Water Starter Pokemon.

Master League: 3 / 5

Tyranitar's not bad, it's just poorly positioned. It's got stats, it's got moves, it's just...it doesn't beat much? It simply suffers from having too many weaknesses, especially its double weakness to Fighting. While incredibly powerful against Mewtwo and the Giratinas, it fails to handle the top Dragons in the format, and it stands no chance against powerful Waters like Kyogre. It's good against, like, Lugia, at least? That's something?

Shadow Tyranitar is preferred over its regular variant due to the consistency of its Fast Attack pressure. Smack Down is generally preferred due to the ubiquity of Zacian and Flying-type Pokemon, but Bite offers greater pressure against Groudon and Dialga.